| # | Country | Total Patents | |
|---|---|---|---|
| #1 | Germany | 5 | |
| #2 | United Kingdom | 5 | |
| #3 | Netherlands | 5 | |
| #4 | France | 3 | |
| #5 | Austria | 2 | |
| #6 | Australia | 2 | |
| #7 | Canada | 2 | |
| #8 | Czechoslovakia | 2 | |
| #9 | Spain | 2 | |
| #10 | Finland | 2 | |
| #11 | Norway | 2 | |
| #12 | United States | 2 | |
| #13 | South Africa | 2 | |
| #14 | Belgium | 1 | |
| #15 | Brazil | 1 | |
| #16 | Switzerland | 1 | |
| #17 | Israel | 1 | |
| #18 | Italy | 1 | |
| #19 | Sweden | 1 | |
| #20 | USSR (Union of Socialist Soviet Republics) | 1 |
| # | Industry | |
|---|---|---|
| #1 | Materials and metallurgy | |
| #2 | Environmental technology | |
| #3 | Civil engineering | |
| #4 | Audio-visual technology | |
| #5 | Computer technology | |
| #6 | Optics | |
| #7 | Organic fine chemistry |
| # | Technology | |
|---|---|---|
| #1 | Metal production and refining | |
| #2 | Climate change mitigation in goods production | |
| #3 | Alloys | |
| #4 | Compounds containing metals | |
| #5 | Inorganic compounds | |
| #6 | Dredging | |
| #7 | Static stores | |
| #8 | Special acyclic compounds | |
| #9 | Cameras | |
| #10 | Television |
| # | Name | Total Patents |
|---|---|---|
| #1 | Middelhoek Servaas | 16 |
| #2 | Middelhoek S | 6 |
| #3 | Baan Diederich Jan | 3 |
| #4 | Rijkeboer Albert | 3 |
| #5 | Rijkeboer A | 2 |
| #6 | Gee Johannes Cornelis De | 2 |
| #7 | Baan Diederich J | 2 |
| #8 | Peters Franciscus Josephus Wil | 2 |
| #9 | Meulen John Frederic William V | 1 |
| #10 | Peters F J W M | 1 |
| Publication | Filing date | Title |
|---|---|---|
| NL7412876A | Method for refining hard lead. | |
| US3929460A | Process for the preparation of vanadium, vanadium alloys or vanadium compounds | |
| GB1429413A | Underwater excavating equipment for a vessel | |
| NL7402177A | Method for preparing magnesium. | |
| GB1394025A | Method of preparation of metals and alloys | |
| CA1026101A | Method of preparation of metals and alloys | |
| NL175736B | Method for preparing titan, nioob or alloys thereof. | |
| NL172566B | Method for preparing vanadium. |